@Test
  public void testOnColorUpdate() {
    PlutoColor color = new PlutoColor(1, 2, 3);
    presenter.onColorUpdate(new PlutoCommunicator.ColorUpdateEvent(color));

    verify(view, times(1)).setBackgroundColor(color);
    verify(view, times(1)).setSeekBar(color);
  }
  @Test
  public void testOnColorUpdateNullColor() {
    presenter.onColorUpdate(new PlutoCommunicator.ColorUpdateEvent(null));

    verifyZeroInteractions(view);
  }